The age of the Kockatea Shale (Lower Triassic), Perth Basin—a reassessment
作者:
R.A. McTavish,
J.M. Dickins,
期刊:
Journal of the Geological Society of Australia
(Taylor Available online 1974)
卷期:
Volume 21,
issue 2
页码: 195-201
ISSN:0016-7614
年代: 1974
DOI:10.1080/00167617408728844
出版商: Taylor & Francis Group
数据来源: Taylor
摘要:
New evidence for the age ofSubinyoites kashmiricus,combined with that ofClaraia stacheiandDiscophicerassp. cf.D. subkyokticum,has called for a revision in age of the Scythian (Lower Triassic) macrofauna from the Kockatea Shale of Beagle Ridge (BMR 10) Bore. The fauna is now regarded as of Scythian (Gries‐bachian to Smithian) age. Combination of this dating with additional palaeontological evidence from the Perth and Carnarvon Basins: (i) indicates that the base of the Kockatea Shale is markedly different in age in Beagle Ridge (BMR No. 10) Bore, Dongara No. 4, and in outcrop at Mount Minchin and Sugarloaf Hill; (ii) suggests that the Lower Triassic sea was most extensive during the Smithian in the Perth Basin; and (iii) confirms that most of the Locker Shale is younger than the Kockatea Shale.
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